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Finding the Fourth Proportional to 293,458.78, 440,129.85 and 143,634.70

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Solution

The fourth proportional to 293,458.78, 440,129.85 and 143,634.70 is: 215,423.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    293,458.78 : 440,129.85 = 143,634.70 : x
  2. Step 2: Convert to fraction form
    293,458.78/440,129.85 = 143,634.70/x
  3. Step 3: Cross multiply
    293,458.78x = 440,129.85 × 143,634.70
  4. Step 4: Simplify right side
    293,458.78x = 63,217,918,965.80
  5. Step 5: Solve for x
    x = 63,217,918,965.80/293,458.78
  6. Step 6: Final answer
    x = 215,423.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.